@TECHREPORT{bilcodec:200501,
  title = {Periodic Autoregressive Time Series Models in {R}: The partsm Package},
  author = {L\'opez-de-Lacalle, Javier},
  year = {2005},
  institution = {Universidad del Pa\'is Vasco - Departamento de Econom\'ia Aplicada III (Econometr\'ia y Estad\'istica)},
  type = {BILCODEC Working Paper},
  number = {2005-01},
  url = {http://EconPapers.repec.org/RePEc:ehu:bilcod:200501}
}